How to proceed?

Yesterday I was gaming on my pc and all of a sudden everything turned off. Rgb was black etc.

I tried to push the power button but nothing happened.

So I flipped the switch on my psu, pushed the pc power button for a few seconds. Than flipped the psu on again and tried to turn the pc on again…

I had electrical crackles when i did so, the pc did went on. I instantly flipped the psu switch again.

I did also notice a burnt smell after a few moment..

I did open the pc case to have a look, pulled the psu but couldn’t see or smell anything there..my gpu di smell so I think that died??

My main question now is, how do i proceed now to check if everything else is working without risking braking more parts..

Also I still have warranty on my gpu, is this something thats covered by warranty??